A few degrees warmer than Wednesday, as much as 15 to 20 degrees above average for the mountains, inland valleys, and high desert. High temperatures for Thursday for the coastal areas: 70 to 80, western valleys and inland Orange County: 79 to 86, inland valleys: 83 to 90, mountains between 4000 feet and 7000 feet: 70 to 80, high desert: 86 to 90, low desert: 98 to 102.